Steerable percussion air drilling system
By increasing penetration rates and bit life, especially in hard formations, the use of down-hole air hammers in the oil field has significantly reduced drilling costs in the Northeast US and West Texas. Unfortunately, drilling by this percussion method has been limited mostly to straight hole applications. This paper presents a new concept of a percussion drilling tool which performs both the function of a down-hole hammer as well as that of a down-hole motor. Such a drilling tool, being introduced here as Steerable Percussion Air Drilling System (SPADS), eliminates the necessity to rotate the drill string and, consequently, enables the use of down-hole air hammers to drill directional wells.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- OSTI ID:
- 357737
- Report Number(s):
- CONF-980213--
- Country of Publication:
- United States
- Language:
- English
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